I am guessing it's in a . Cpp or . Cc file rather than the header file.
Template function definitions need to be in the header (or you can use more exotic features like explicit template instantiation). This is because a template function is only understood as actual code when it is used, and I assume your use is not in the same translation unit as your definition.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.